COSMOS 1771

COSMOS 1771 is an active satellite operated by Russia (CIS), launched on 1986-08-20 from Baikonur, Kazakhstan. With over 40 years in orbit, it has far exceeded many satellites’ design lifetimes. It orbits in Low Earth Orbit (LEO) at altitudes between 906 km and 1,003 km with an inclination of 65.0°. It travels at approximately 26,555 km/h (7.38 km/s), completing one full orbit every 104 minutes — that’s roughly 13.83 orbits per day. At its current altitude, the estimated orbital lifetime before atmospheric re-entry is ~100–500 years. Orbital Radar tracks COSMOS 1771 in real time using the latest two-line element set (TLE) data, providing live position, altitude, speed and orbital path updated continuously.

COSMOS 1771 orbits at an average altitude of 955 km in the upper LEO band, where atmospheric drag is negligible and objects can persist for centuries to millennia. This altitude is used by broadband constellations like OneWeb and by scientific missions requiring stable orbits far from the densest debris bands. Within ±50 km of COSMOS 1771’s average altitude, there are currently 299 active payloads and 1,070 tracked debris or rocket body fragments. With an inclination of 65.0°, COSMOS 1771 passes over latitudes between 65.0°N and 65.0°S, covering most populated land masses in both hemispheres. This mid-inclination band balances global coverage with efficient launch energy requirements. Russia (CIS) operates approximately 1,285 active satellites in total, of which 169 share a similar altitude band with COSMOS 1771.